For my money, the mouse was the first device to successfully bridge the gap of human-computer interactivity. Brilliant in its simplicity, we wouldn’t have the myriad of newfangled HCI devices we have today without the mouse; think trackpads, Wiimotes, touchscreens, Kinect, Glass, etc. Then again, I could live without all the Glassholes in the world, but I won’t blame Englebart on the creation of the hipster.